1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/security/cryptoplugins/cryptospiplugins/source/softwarecrypto/rsasignerimpl.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,132 @@
     1.4 +/*
     1.5 +* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of the License "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +*
    1.19 +*/
    1.20 +
    1.21 +
    1.22 +#include "rsasignerimpl.h"
    1.23 +#include "pluginconfig.h"
    1.24 +#include "rsafunction.h"
    1.25 +
    1.26 +using namespace SoftwareCrypto;
    1.27 +
    1.28 +// Implementation of CRSASignerImpl 
    1.29 +CRSASignerImpl* CRSASignerImpl::NewL(const CKey& aKey, TUid aPaddingMode)
    1.30 +	{
    1.31 +	CRSASignerImpl* self = CRSASignerImpl::NewLC(aKey, aPaddingMode);
    1.32 +	CleanupStack::Pop(self);
    1.33 +	return self;
    1.34 +	}
    1.35 +
    1.36 +CRSASignerImpl* CRSASignerImpl::NewLC(const CKey& aKey, TUid aPaddingMode)
    1.37 +	{
    1.38 +	CRSASignerImpl* self = new(ELeave) CRSASignerImpl(aPaddingMode);
    1.39 +	CleanupStack::PushL(self);
    1.40 +	self->ConstructL(aKey);
    1.41 +	return self;
    1.42 +	}
    1.43 +
    1.44 +CRSASignerImpl::CRSASignerImpl(TUid aPaddingMode) 
    1.45 +	: iPaddingMode(aPaddingMode)
    1.46 +	{
    1.47 +	}
    1.48 +
    1.49 +CRSASignerImpl::~CRSASignerImpl()
    1.50 +	{
    1.51 +	delete iPadding;
    1.52 +	}
    1.53 +
    1.54 +void CRSASignerImpl::ConstructL(const CKey& aKey)
    1.55 +	{
    1.56 +	CSignerImpl::ConstructL(aKey);
    1.57 +	SetPaddingModeL(iPaddingMode);
    1.58 +	}
    1.59 +
    1.60 +CExtendedCharacteristics* CRSASignerImpl::CreateExtendedCharacteristicsL()
    1.61 +	{
    1.62 +	// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
    1.63 +	// for exclusive use and are not CERTIFIED to be standards compliant.
    1.64 +	return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
    1.65 +	}
    1.66 +
    1.67 +const CExtendedCharacteristics* CRSASignerImpl::GetExtendedCharacteristicsL()
    1.68 +	{
    1.69 +	return CRSASignerImpl::CreateExtendedCharacteristicsL();
    1.70 +	}
    1.71 +
    1.72 +TUid CRSASignerImpl::ImplementationUid() const
    1.73 +	{
    1.74 +	return KCryptoPluginRsaSignerUid;
    1.75 +	}
    1.76 +
    1.77 +void CRSASignerImpl::SetKeyL(const CKey& aPrivateKey) 
    1.78 +	{
    1.79 +	DoSetKeyL(aPrivateKey);
    1.80 +	Reset();
    1.81 +	}
    1.82 +
    1.83 +void CRSASignerImpl::SetPaddingModeL(TUid aPaddingMode)
    1.84 +	{
    1.85 +	CPadding* padding(0);
    1.86 +	switch (aPaddingMode.iUid)
    1.87 +		{
    1.88 +		case KPaddingModeNone:
    1.89 +			padding = CPaddingNone::NewL(GetMaximumOutputLengthL());
    1.90 +			break;
    1.91 +		case KPaddingModePkcs1_v1_5_Signature:
    1.92 +			padding = CPaddingPKCS1Signature::NewL(GetMaximumOutputLengthL());
    1.93 +			break;
    1.94 +		default:
    1.95 +			User::Leave(KErrNotSupported);
    1.96 +		}
    1.97 +		
    1.98 +	delete iPadding;
    1.99 +	iPadding = padding;
   1.100 +	iPaddingMode = aPaddingMode;
   1.101 +	Reset();
   1.102 +	}
   1.103 +
   1.104 +TInt CRSASignerImpl::GetMaximumInputLengthL() const
   1.105 +	{
   1.106 +	return GetMaximumOutputLengthL() - iPadding->MinPaddingLength();	
   1.107 +	}
   1.108 +
   1.109 +TInt CRSASignerImpl::GetMaximumOutputLengthL() const
   1.110 +	{
   1.111 +	const TInteger& paramN = iKey->GetBigIntL(KRsaKeyParameterNUid);
   1.112 +	return paramN.ByteCount();	
   1.113 +	}
   1.114 +
   1.115 +void CRSASignerImpl::SignL(const TDesC8& aInput, CCryptoParams& aSignature) 
   1.116 +	{
   1.117 +	HBufC8* buf = HBufC8::NewLC(GetMaximumOutputLengthL());
   1.118 +	TPtr8 ptr = buf->Des();
   1.119 +	
   1.120 +	//The following will panic if aInput is larger than MaxOutputLength() It is
   1.121 +	//likely that the caller has passed in something that has not been hashed.
   1.122 +	//This is a programming, and likely a security error, in client code, not a
   1.123 +	//problem here.
   1.124 +	iPadding->PadL(aInput, ptr);
   1.125 +
   1.126 +	RInteger input = RInteger::NewL(ptr);
   1.127 +	CleanupClosePushL(input);
   1.128 +	RInteger output;
   1.129 +
   1.130 +	RSAFunction::SignL(*iKey, input, output);
   1.131 +	CleanupClosePushL(output);
   1.132 +
   1.133 +	aSignature.AddL(output, KRsaSignatureParameterSUid);
   1.134 +	CleanupStack::PopAndDestroy(3, buf); //input, buf
   1.135 +	}